Container-opening device



Patented Mar. 23, 1926.

"mm: LEE AND, orrARL s PEARSON, or INGERSOLL, ONTARIO, ANADA.

CONTAINER-OPENING DEV-ICE.

" Applicationfiled December 27,1924. Se rial- No. 758,470.

' T 0 GZZ wizom it may concern:

it kn wn that we, {forth Iran a 7 both subjects of'he A both. residents otown of lnp'ersoll, in the county 01 Oxford. in the Frovince oi Ontario, Canada, have invented certain new and useful Improve- Quarter-s Pm nicnts in Contai er-Opening Devices, of which the fOllO Wl is the. specification.

(lur invention relates to improvements in container opening de ices, and tieobject of the invention is to devise simple efhcient means easily and quickly operated 'ito'r'litting' or prying the lid off an air-tight conti'ner without in any way detrimentally affectingthe container body or lid, and avoiding the production of an air leakage between l l tie container bony and lid by the operation or" the opener, and the container will therefore remain air proof or sealed when the lid is replaced; and is such a device as will permit the easy replacing of the lid and by such replacement return automatically the device to its normal position so that itmay be again operated to again remove the lid whenever desired, and it con sists essentially of the arrangementand C011? struotion or" parts hereinafter more particu: V

larly explained.

Fig. 1 is a plan View of a container showing our device applied thereto.

Fig. 2 is a sectional view on line Fig. 1, showing the container lid in the closed position.

Fig. 3 is a similar view to Fig. 2 showing" the lid'in the priedu'o position.

Fig. -l is a sideeievation looking in the direction of arrowylfiig. 1.

in the drawings like characters of reference indicate corresponding parts in each figure.

' 1 indicates a container body provided in proximity to its upper edge by an annular lip 2.

3 is a lid, the annular wall 3* 0t which tightly round the upper edge portion 1* of the container body 1 against the hp 2 so as to form an air-tightjoint.

It is well known that it is a very diiiicult matter to remove the lid fromthe body of containers containing many classes of material, such blacking, and with this purpose we have devised the following device:-

l is a projection extending radially from the lid 3 and provided with an internally threaded orifice 4 4 5 is a threaded stein which is screwed in to theorifice and is provided at its upper end with an operating handle 6 which may he ot any suitable tori'n such the wing form shown or extended laterally in crank tornio-rformed in any other way to provide a finger grip so that the threaded stein may be manually turned. I

The lower endot' the stem bears against the annular lip 2 when the cover 3 is in its closed position. The thread the stem is a steep pitch thread being preferably at an angle of 27, althoughwe do not wish to confine ourselves specifically to this angle of pitch. he thread of the orifice 41* is correspondingly threaded so as to mesh with the thread oi the stern. Any angle may be eniployed approxiina l. g the aforesaid pitch that it does not require much pressure to open the contai er rat is suiiiciently steep to produce rotary movement of the stem when end pressure is applied, whereby the stem is turned and moved longitudinally back to its normal position. The lower end of the stem is slightly riveted over, as indicated at- 5*, to prevent its complete witlu drawal from the orifice 4* so that there will be no danger of it becoming detached from the container and lost. f

\Vhen it is desired to openthe container, all that it is necessary to do is to turn the stem a half turn so that such stem, by means of its thread, is carried quickly downward against the hp 2, thereby exerting an upward force upon the lid to pry it at the side on whicl the stem islocated upward tree the upper edge portion l ofthe container body into the pOSltlOfl shown in Fig. 8.

in this position air is permitted to enter the container and thereby relieve the suction and permit the easy removal of the lid from the container body.

lVhen it is desired to close the container by replacing the lid. all that it is necessary to do to return the lid to the position shown in Fig. and then by exerting a downward pressure upon the lid, an upward pressure of the hp 2 against the stem is produced, such pressure by means of the steep pitch of the thread of the stem causing the stem to turn in the internally threaded orifice r so that such stenris carried longitudinally back to the normal posi tion shown in Fig. 2, as the lid travels down its closed positionf and thereby again producing a sealed joint between the lid nut the container body which will be absolutely air-tight.

Although we have shown our device as applied to a container for blacking, it will of course be understood that' it is applicable to any air-tight container, the lid or cover 01? which is removable, and is particularly adapted to all sheet metal containers of this type, such as are used for containing various commodities such as honey, syrup, lard or paint.

hat we claim as our invention is:

1. In an air-tight container, the combination with the container body provided with an annular lip. of a lid fitting around the upper edge of the container body against the aforesaid lip. a projection extending radially from the lid having a threaded orifice therein. and a threaded stein fitting within the orifice and engaging the thread thereof and bearing at its lower end against the lip, the thread being of such a pitch as to produce turning movement within the aforesaid orifice when pressure is exerted against.

an annular lip extending outward adjacent 1 its upper edge, of a projection extending radially from the lid, a threaded rotatable steni longitudinally movable within the projection and having a slight enlargement at the lower end of the stem to prevent its complete withdrawal, said stein being adapted to be forced by manual pressure in a direction parallel with its axis longitudinally against the lip for forcing the container lid upward, said stein being adapted to return.

to its normal position by downward manual. pressure upon the lid. 7

JOHN LEE. CHAS. PEARSON. 

